r = input('请输入r的值:')
r = int(r)
zc = 2*3.14*r
mj = 3.14*r*r
print("半径为{}的圆的周长：{:=<10,.6f},面积:{:=<10,.6f}".format(r,zc,mj))
print(2*3.14*r)
print(3.14*r*r)
